probing vs Schroedinger's Cat (trunk only)

Someone in the newsgroup complained about zapping probing at a large
box dropped by a quantum mechanic and being told that it was empty rather
than that it held a corpse or live cat.  This sidesteps the issue by
reporting "the box seems empty" instead of "the box is empty", and not
setting its contents-known flag.  (That message is the main difference
between probing and the assorted other methods of observation [telepathy
and monster detection and possibly Warning for live cat, object detection
and food detection for dead cat's corpse] which might be expected to
trigger the cat's fate but don't.)  This also makes probing of self and
of monsters set the contents-known and locking-known flags for containers
in inventory, same as is done for probing which hits objects.  (Display of
container contents still only occurs for loose objects, not in inventory.)

include/obj.h

@@ -1,4 +1,4 @@
-/*	SCCS Id: @(#)obj.h	3.5	2006/12/14	*/
+/*	SCCS Id: @(#)obj.h	3.5	2007/02/17	*/
 /* Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1985. */
 /* NetHack may be freely redistributed.  See license for details. */
 
@@ -242,6 +242,7 @@ struct obj {
 #define Is_box(otmp)	(otmp->otyp == LARGE_BOX || otmp->otyp == CHEST)
 #define Is_mbag(otmp)	(otmp->otyp == BAG_OF_HOLDING || \
 			 otmp->otyp == BAG_OF_TRICKS)
+#define SchroedingersBox(o)	((o)->otyp == LARGE_BOX && (o)->spe == 1)
 
 /* dragon gear */
 #define Is_dragon_scales(obj)	((obj)->otyp >= GRAY_DRAGON_SCALES && \

src/end.c

@@ -515,7 +515,7 @@ int what;
 	switch(what) {
 		case CAT_CHECK:			 /* Schroedinger's Cat */
 			/* Ascending is deterministic */
-			if (otmp->otyp == LARGE_BOX && otmp->spe == 1)
+			if (SchroedingersBox(otmp))
 				return rn2(2);
 			break;
 	}
@@ -972,8 +972,7 @@ boolean identified, all_containers, reportempty;
 		box->cknown = 1;	/* we're looking at the contents now */
 		if (identified) box->lknown = 1;
 		cat = deadcat = FALSE;
-		if (box->otyp == LARGE_BOX &&
-		    box->spe == 1 && !Schroedingers_cat) {
+		if (SchroedingersBox(box) && !Schroedingers_cat) {
 			/* Schroedinger's Cat? */
 			cat = odds_and_ends(box, CAT_CHECK);
 			if (cat) Schroedingers_cat = TRUE;

src/mkobj.c

@@ -1,4 +1,4 @@
-/*	SCCS Id: @(#)mkobj.c	3.5	2007/01/02	*/
+/*	SCCS Id: @(#)mkobj.c	3.5	2007/02/17	*/
 /* Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1985. */
 /* NetHack may be freely redistributed.  See license for details. */
 
@@ -1082,7 +1082,7 @@ register struct obj *obj;
 {
 	int wt = objects[obj->otyp].oc_weight;
 
-	if (obj->otyp == LARGE_BOX && obj->spe == 1) /* Schroedinger's Cat */
+	if (SchroedingersBox(obj))
 		wt += mons[PM_HOUSECAT].cwt;
 	if (Is_container(obj) || obj->otyp == STATUE) {
 		struct obj *contents;

src/pickup.c

@@ -1,4 +1,4 @@
-/*	SCCS Id: @(#)pickup.c	3.5	2007/01/02	*/
+/*	SCCS Id: @(#)pickup.c	3.5	2007/02/17	*/
 /* Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1985. */
 /* NetHack may be freely redistributed.  See license for details. */
 
@@ -2166,7 +2166,7 @@ int held;
 	/* from here on out, all early returns go through containerdone */
 
 	/* check for Schroedinger's Cat */
-	quantum_cat = (current_container->spe == 1); /* "it's _now_ empty" */
+	quantum_cat = SchroedingersBox(current_container);
 	if (quantum_cat) {
 	    observe_quantum_cat(current_container);
 	    used = 1;
@@ -2706,7 +2706,7 @@ struct obj *box;	/* or bag */
 	}
 	if (maybeshopgoods && !box->no_charge)
 	    subfrombill(box, shop_keeper(*in_rooms(ox, oy, SHOPBASE)));
-    } else if (box->spe) {
+    } else if (SchroedingersBox(box)) {
 	char yourbuf[BUFSZ];
 
 	observe_quantum_cat(box);

src/zap.c

@@ -1,4 +1,4 @@
-/*	SCCS Id: @(#)zap.c	3.5	2007/01/27	*/
+/*	SCCS Id: @(#)zap.c	3.5	2007/02/17	*/
 /* Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1985. */
 /* NetHack may be freely redistributed.  See license for details. */
 
@@ -434,9 +434,14 @@ struct monst *mtmp;
 #else
 	if (mtmp->minvent) {
 #endif
-	    for (otmp = mtmp->minvent; otmp; otmp = otmp->nobj)
+	    for (otmp = mtmp->minvent; otmp; otmp = otmp->nobj) {
 		otmp->dknown = 1;	/* treat as "seen" */
-	    (void) display_minventory(mtmp, MINV_ALL, (char *)0);
+		if (Is_container(otmp) || otmp->otyp == STATUE) {
+		    otmp->lknown = 1;
+		    if (!SchroedingersBox(otmp)) otmp->cknown = 1;
+		}
+	    }
+	    (void) display_minventory(mtmp, MINV_ALL|MINV_NOLET, (char *)0);
 	} else {
 	    pline("%s is not carrying anything.", noit_Monnam(mtmp));
 	}
@@ -1614,9 +1619,16 @@ struct obj *obj, *otmp;
 		obj->dknown = 1;
 		if (Is_container(obj) || obj->otyp == STATUE) {
 		    obj->cknown = obj->lknown = 1;
-		    if (!obj->cobj)
-			pline("%s empty.", Tobjnam(obj, "are"));
-		    else {
+		    if (!obj->cobj) {
+			boolean catbox = SchroedingersBox(obj);
+
+			/* we don't want to force alive vs dead
+			   determination for Schroedinger's Cat here,
+			   so just make probing be inconclusive for it */
+			if (catbox) obj->cknown = 0;
+			pline("%s empty.",
+			      Tobjnam(obj, catbox ? "seem" : "are"));
+		    } else {
 			struct obj *o;
 			/* view contents (not recursively) */
 			for (o = obj->cobj; o; o = o->nobj)
@@ -2243,8 +2255,13 @@ boolean ordinary;
 		  {
 		    struct obj *otmp;
 
-		    for (otmp = invent; otmp; otmp = otmp->nobj)
+		    for (otmp = invent; otmp; otmp = otmp->nobj) {
 			otmp->dknown = 1;
+			if (Is_container(otmp) || otmp->otyp == STATUE) {
+			    otmp->lknown = 1;
+			    if (!SchroedingersBox(otmp)) otmp->cknown = 1;
+			}
+		    }
 		    learn_it = TRUE;
 		    ustatusline();
 		    break;